When a woman's grotesque amount of fat in her lower stomach area bulges through pants or jeans so far, that it looks like that area of her body is swollen, and is no doubt covering her vagina. The absolute doublechin of stomachs.

Dude 1: "Man, her Poon-Bulge was so huge, that I had to LIFT that flap just to get in there and get some last night! Serious tubster."